CN101281440B - Optical indication device image quality control method - Google Patents
Optical indication device image quality control method Download PDFInfo
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- CN101281440B CN101281440B CN2008100430837A CN200810043083A CN101281440B CN 101281440 B CN101281440 B CN 101281440B CN 2008100430837 A CN2008100430837 A CN 2008100430837A CN 200810043083 A CN200810043083 A CN 200810043083A CN 101281440 B CN101281440 B CN 101281440B
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Abstract
An image quality control method of an optical indicating device is used on the indicating device of a computer or a video system, including the following steps: obtaining a new frame image, processing the image, determining the position and the shape of the overlapping area for matching next time, extracting the characteristic value of the pixel in the overlapping area, adjusting the parameter which influences the image quality according to the characteristic value, namely the method adjusts the parameter which influences the image quality of the next frame according to the pixel value in the overlapping area, so that the most remarkable interesting area in the matching operation achieves the ideal condition, thus overcoming the mean value of the pixel of the whole image in the prior art as the regulating basis to cause distortion of the information of the image in the next frame, further lead to the defect of computation error.
Description
[technical field]
The present invention relates to a kind of image quality control method, be meant the method for the picture quality of being obtained with control on the optical indicating device that is used for computing machine or video system especially.
[background technology]
Optical indicating device as mouse, is one of human interface device the most commonly used.When the user on working surface during rolling mouse, just this motion of perception of the movement sensing device in the mouse, the pointer on the control computer screen is corresponding thus moves.
Fig. 1 is the composition block scheme of optical mouse, this mouse 1 comprises luminescence unit (LED) 10, image sensor 11, programmable gain amplifier (PGA) 12, converter (A/D) 13, data processing unit 14 and control module 15, at work, luminescence unit 10 is lighted with certain frequency usually, launch light to the desktop 2 of this mouse 1 placement, usually this desktop 2 has certain textural characteristics, it is the rough surface of microcosmic, the light that luminescence unit 10 sends is after desktop 2 reflections, and via being input on the image sensor 11 after lens (not shown) focusing, this image sensor 11 forms voltage or current signal according to catoptrical intensity, voltage or the current signal that is formed by 12 pairs of these image sensors 10 of programmable gain amplifier amplifies afterwards, and this voltage or current signal are converted to digital signal by converter 13, be about to the image digitazation of desktop 2.And the image that data processing unit 14 is sampled according to image sensor 11 calculates, thereby determine the displacement of this mouse 1, its detailed process is set at reference picture (being reference frame) for it with a previous sub-picture, a sub-picture of then obtaining is set at target image (being target frame), by selecting a reference block in the target image, and in reference picture, select a plurality of selection pieces, this reference block is mated one by one and compares with selecting piece, determine maximally related selection piece afterwards, select the position of piece to determine the displacement of this mouse 1 according to this, be sent to main frame after by control module 15 this displacement being handled afterwards and move with the correspondence of controlling screen cursor.
Be accuracy and the validity that guarantees that coupling is calculated, industry adopts usually adjusts the time shutter, the amplification coefficient of exposure intensity or programmable gain amplifier is obtained preferable image with assurance, and then the accuracy and the validity of the calculating of assurance coupling, relevant prior art can be consulted Chinese patent No. 01124181.0, the technical scheme that it disclosed is that the pixel average with present image serves as according to adjusting time shutter or light source exposure intensity, to change the exposure of next frame image pixel unit, thereby guarantee the image quality of this image sensor output, the weak point of this kind mode is on the apparent in view surface of some contrast, the method thinks that in fact a good pixel average can not reflect the quality of picture quality, as shown in Figure 2, wherein the blank parts in the present frame is the zone of overflow, and the part with shade can be the weak excessively zone of signal, this moment, the mean value of whole current frame pixel may more satisfactory (promptly between 90 to 140), but in fact participate in reference block most of of coupling all in the zone of above-mentioned overflow, and have only sub-fraction is in the weak excessively part of signal, if this moment, the mean value with whole current frame pixel was the foundation of adjusting exposure, then may cause the information of the selection piece that on the image of back frame, mates with reference block distortion to occur, thereby cause miscount.
[summary of the invention]
The purpose of this invention is to provide a kind of image quality control method, it can regulate the parameter that influences picture quality targetedly according to interesting areas, thereby the optimization of matching zone reaches accurate coupling.
For achieving the above object, image quality control method of the present invention is used for computing machine or video system indicating device, and this optical indicating device has a programmable amplifier, and this method comprises the steps:
Obtain a new two field picture;
This image is handled;
Definite information overlap zone position and shape of next time mating;
Extract the eigenwert of the pixel in this information overlap district, wherein this eigenwert is number of pixels, the signal weak excessively number of pixels of number of pixels, the signal of weak number of pixels, pixel average thrin or overflow, a plurality of combinations of pixel average excessively of overflow;
Influence the parameter of picture quality according to this eigenwert adjustment, wherein this parameter comprises the two the combination of enlargement factor of time shutter, light source exposure intensity and this programmable amplifier of enlargement factor, image of combination, programmable amplifier of one of time shutter of image and light source exposure intensity or its.
For achieving the above object, the present invention also proposes a kind of optical indication device image quality control method, is used for computing machine or video system indicating device, and this optical indicating device has a programmable amplifier, and this method comprises the steps:
Obtain a new two field picture;
This image is handled;
The position and the shape in definite information overlap district of next time mating;
The number of pixels that the number of pixels of the overflow in the computing information overlay region and signal are weak excessively;
Whether the number of pixels of judging overflow is greater than first preset value;
As the number of pixels of overflow greater than first preset value, then regulate the parameter that influences picture quality at the pixel portion of overflow, wherein this parameter comprises the two the combination of enlargement factor of time shutter, light source exposure intensity and this programmable amplifier of enlargement factor, image of combination, programmable amplifier of one of time shutter of image and light source exposure intensity or its, and the current frame image that will newly import is replaced by reference frame;
Less than first preset value, judge then that whether the weak excessively number of pixels of signal is greater than second preset value as the number of pixels of overflow;
As the weak excessively number of pixels of signal greater than second preset value, then regulate the parameter that influences picture quality at the weak excessively pixel portion of signal, wherein this parameter comprises the two the combination of enlargement factor of time shutter, light source exposure intensity and this programmable amplifier of enlargement factor, image of combination, programmable amplifier of one of time shutter of image and light source exposure intensity or its, and the current frame image that will newly import is replaced by reference frame.
According to above-mentioned principal character, described first and second preset value is half.
Compared with prior art, the present invention influences the parameter of picture quality according to the eigenwert adjustment of pixel in the information overlap district, make the interesting areas that in matching operation, merits attention most reach ideal state, thereby distortion appears in the information that overcomes in the prior art pixel average with current frame image and be the selection piece that mates with the reference block of current frame image according to the cause of parameter that adjustment influences picture quality on the image of back frame, further causes the defective of miscount.
[description of drawings]
Fig. 1 is the composition block scheme of optical mouse.
Fig. 2 is the existing reference frame of matching operation and the synoptic diagram of target frame image of carrying out.
Fig. 3 is a process flow diagram of the present invention.
Fig. 4 is the process flow diagram of the embodiment of the invention.
[embodiment]
See also shown in Figure 1, optical indication device image quality control method of the present invention, can be used on computing machine or the video system indicating device, this indicating device is by the image of optics perception exterior object, by calculating the correlativity between two sub-pictures, thereby determine the displacement of this optical indicating device, thereby control the cursor on the display screen corresponding, thereby realize the fixed function of desire with this indicating device.
For understanding conveniently, below in conjunction with Fig. 1 concrete application of the present invention is described, Fig. 1 is the composition block scheme of optical mouse, this mouse 1 comprises luminescence unit (LED) 10, image sensor 11, programmable gain amplifier (PGA) 12, converter (A/D) 13, data processing unit 14 and control module 15, at work, luminescence unit 10 is lighted with certain frequency usually, launch light to the desktop 2 of this mouse 1 placement, usually this desktop 2 has certain textural characteristics, it is the rough surface of microcosmic, the light that luminescence unit 10 sends is after desktop 2 reflections, and via being input on the image sensor 11 after lens (not shown) focusing, this image sensor 11 forms voltage or current signal according to catoptrical intensity, voltage or the current signal that is formed by 12 pairs of these image sensors 10 of programmable gain amplifier amplifies afterwards, and this voltage or current signal are converted to digital signal by converter 13, be about to the image digitazation of desktop 2.And the image that data processing unit 14 is sampled according to image sensor 11 calculates, thereby determine the displacement of this mouse 1, its detailed process is set at reference picture (being reference frame) for it with a previous sub-picture, a sub-picture of then obtaining is set at target image (being target frame), by selecting a reference block in the target image, and in reference picture, select a plurality of selection pieces, this reference block is mated one by one and compares with selecting piece, determine maximally related selection piece afterwards, select the position of piece to determine the displacement of this mouse 1 according to this, be sent to main frame after by control module 15 this displacement being handled afterwards and move with the correspondence of controlling screen cursor.
Be accuracy and the validity that guarantees that coupling is calculated, industry adopts usually adjusts the time shutter, the amplification coefficient of exposure intensity or programmable gain amplifier is obtained preferable image with assurance, and then the accuracy and the validity of the calculating of assurance coupling, as pixel average that can present image is according to adjusting time shutter or light source exposure intensity, to change the exposure of next frame image pixel unit, thereby guarantee the image quality of this image sensor output, the weak point of this kind mode is on the apparent in view surface of some contrast, the method thinks that in fact a good pixel average can not reflect the quality of picture quality, as shown in Figure 2, wherein the blank parts in the present frame is the zone of overflow, and the part with shade can be the weak excessively zone of signal, this moment, the mean value of whole current frame pixel may more satisfactory (promptly between 90 to 140), but in fact participate in reference block most of of coupling all in the zone of above-mentioned overflow, and have only sub-fraction is in the weak excessively part of signal, if this moment, the mean value with whole current frame pixel was the foundation of adjusting exposure, then may cause the information of the selection piece that on the image of back frame, mates with reference block distortion to occur, thereby cause miscount.Therefore the purpose of this invention is to provide a kind of image quality control method, it can regulate the parameter that influences picture quality targetedly according to interesting areas, thereby the optimization of matching zone reaches accurate coupling.
See also shown in Figure 3ly, be process flow diagram of the present invention, image quality control method of the present invention comprises the steps:
Obtain a new two field picture;
This image is handled;
Definite information overlap zone position and shape of next time mating;
Extract the eigenwert of the pixel in this information overlap district, this eigenwert can be the number of pixels or the weak excessively number of pixels of signal of information overlap district overflow, or the eigenwert of information overlap district pixel is a pixel average, in concrete the application, can make different selection one according to different situations, or some;
Influence the parameter of picture quality according to this eigenwert adjustment, the parameter that wherein influences picture quality comprises one of the enlargement factor of the time shutter of image, programmable amplifier and light source exposure intensity or wherein a plurality of.
Adjust one of the enlargement factor of time shutter, programmable amplifier and light source exposure intensity or wherein a plurality of by above-mentioned eigenwert according to the pixel in the overlay region, thereby make the interesting areas that in matching operation, merits attention most reach ideal state, thereby the pixel average that overcomes whole present image in the prior art further causes the defective of miscount for distortion appears in the information of the selection piece that foundation cause of adjusting exposure mates with reference block on the image of back frame.
See also shown in Figure 4, be the process flow diagram of the embodiment of the invention, this can be for the extremely significantly application of desktop of contrast, the image that promptly obtains may partly be signal excessively a little less than, and another part is the situation of overflow, and method of the present invention specifically comprises the steps:
Obtain a new two field picture, i.e. step S01;
This image is handled, i.e. step S02;
The position and the shape in definite information overlap district of next time mating, i.e. step S03;
The number of pixels that the number of pixels of the overflow in the computing information overlay region and signal are weak excessively, i.e. step S04;
Whether the number of pixels of judging overflow is half, i.e. step S05 greater than first preset value in the present embodiment;
Greater than first preset value, then regulate the parameter that influences picture quality at the pixel portion of overflow as the number of pixels of overflow, and the current frame image that will newly import is replaced by reference frame, promptly step S06 returns step S01 afterwards;
Less than first preset value, whether then judge the weak excessively number of pixels of signal greater than second preset value as the number of pixels of overflow, promptly step S07 then returns step S01 in this way;
Greater than second preset value, then regulate the parameter that influences picture quality at the weak excessively pixel portion of signal as the weak excessively number of pixels of signal, and the current frame image that will newly import is replaced by reference frame, promptly step S08 returns step S01 afterwards.
According to above-mentioned principal character, the parameter that wherein influences picture quality comprises one of the enlargement factor of the time shutter of image, programmable amplifier and light source exposure intensity or wherein a plurality of.
From the above mentioned, number of pixels and the signal excessively weak number of pixels adjustment method that influence the parameter of picture quality of the present invention by above-mentioned overflow according to the pixel in the overlay region, make the interesting areas that in matching operation, merits attention most reach ideal state, thereby the mean value that overcomes whole reference frame pixel in the prior art further causes the defective of miscount for distortion appears in the information of the selection piece that foundation cause of adjusting exposure mates with reference block on the image of back frame.
Though disclosed specific implementation method of the present invention above, they are not the limitations of the scope of the invention, and its application also can be extended to all indicating equipments.Therefore, knowing those skilled in the art person is also contained within the scope of the present invention the above concrete modifications and variations of implementing.
Claims (3)
1. an optical indication device image quality control method is used for computing machine or video system indicating device, and this optical indicating device has a programmable amplifier, it is characterized in that this method comprises the steps:
Obtain a new two field picture;
This image is handled;
Definite information overlap zone position and shape of next time mating;
Extract the eigenwert of the pixel in this information overlap district, wherein this eigenwert is number of pixels, the signal weak excessively number of pixels of number of pixels, the signal of weak number of pixels, pixel average thrin or overflow, a plurality of combinations of pixel average excessively of overflow;
Influence the parameter of picture quality according to this eigenwert adjustment, wherein this parameter comprises the two the combination of enlargement factor of time shutter, light source exposure intensity and this programmable amplifier of enlargement factor, image of combination, programmable amplifier of one of time shutter of image and light source exposure intensity or its.
2. an optical indication device image quality control method is used for computing machine or video system indicating device, and this optical indicating device has a programmable amplifier, it is characterized in that this method comprises the steps:
Obtain a new two field picture;
This image is handled;
The position and the shape in definite information overlap district of next time mating;
The number of pixels that the number of pixels of the overflow in the computing information overlay region and signal are weak excessively;
Whether the number of pixels of judging overflow is greater than first preset value;
As the number of pixels of overflow greater than this first preset value, then regulate the parameter that influences picture quality at the pixel portion of overflow, wherein this parameter comprises the two the combination of enlargement factor of time shutter, light source exposure intensity and this programmable amplifier of enlargement factor, image of combination, programmable amplifier of one of time shutter of image and light source exposure intensity or its, and the current frame image that will newly import is replaced by reference frame;
Less than this first preset value, judge then that whether the weak excessively number of pixels of signal is greater than second preset value as the number of pixels of overflow;
As the weak excessively number of pixels of signal greater than second preset value, then regulate the parameter that influences picture quality at the weak excessively pixel portion of signal, wherein this parameter comprises the two the combination of enlargement factor of time shutter, light source exposure intensity and this programmable amplifier of enlargement factor, image of combination, programmable amplifier of one of time shutter of image and light source exposure intensity or its, and the current frame image that will newly import is replaced by reference frame.
3. optical indication device image quality control method as claimed in claim 2 is characterized in that: described first and second preset value is half.
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| CN2008100430837A CN101281440B (en) | 2008-01-29 | 2008-01-29 | Optical indication device image quality control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1503198A (en) * | 2002-11-22 | 2004-06-09 | ���ǵ�����ʽ���� | Method for processing light mouse data |
| CN1333329C (en) * | 2003-10-29 | 2007-08-22 | 艾勒博科技股份有限公司 | Computer pixel moving method and position tracing sensor using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1503198A (en) * | 2002-11-22 | 2004-06-09 | ���ǵ�����ʽ���� | Method for processing light mouse data |
| CN1333329C (en) * | 2003-10-29 | 2007-08-22 | 艾勒博科技股份有限公司 | Computer pixel moving method and position tracing sensor using same |
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Granted publication date: 20110504 Termination date: 20140129 |